Trainees were divided into two group; Cap-attached Colonoscopy group or Regular Colonoscopy group. Trainees allocated to the former group undergo colonoscopy with cap for all cases, the latter without cap.

Placebo Comparator: Regular colonoscopy

Device: Cap-attached Colonoscopy Versus Regular Colonoscopy

Trainees were divided into two group; Cap-attached Colonoscopy group or Regular Colonoscopy group. Trainees allocated to the former group undergo colonoscopy with cap for all cases, the latter without cap.

Detailed Description:

Colorectal cancer is one of the major malignancies in western countries and also in Japan. Therefore , the demand for total colonoscopy (TCS) has risen remarkably. However, failure to reach the cecum occurs in up to 10 % of cases.

A difficult colonoscopy procedure will often be associated with more complications, and require heavier sedation to alleviate patient's discomfort.

Auxiliary devices that could facilitate the examination would be needed. A cap is a simple device that can be attached to the tip of a colonoscope. The advantage of the cap in getting a good view might be helpful in cecal intubation by depressing the folds and also by keeping an appropriate distance between the colonoscope lens and colonic mucosa. We speculated that inexperienced colonoscopists would obtain greater benefit from cap-attached colonoscopy.

Eligibility

Ages Eligible for Study:

18 Years and older

Genders Eligible for Study:

Both

Accepts Healthy Volunteers:

No

Criteria

Inclusion Criteria:

Patients who undergo colonoscopy examination

Exclusion Criteria:

Known to have colonic stricture or obstructing tumor from the results of other investigations such as CT scan or barium enema

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Please refer to this study by its ClinicalTrials.gov identifier: NCT01400087